The Electronic Control Module (ECM) detects the following condition:
- The oil filter differential pressure is greater than
200 kPa (29 psi) for 30 seconds. - The jacket water coolant temperature is greater than
63 °C (145 °F) . - The engine has reached low idle for at least 12 seconds.
System Response:
The ECM will log the event. The warning for the oil filter differential pressure is determined by subtracting the filtered oil pressure from the unfiltered oil pressure. The warning becomes inactive when the coolant temperature falls below
Possible Performance Effect:
- None
Troubleshooting:
- There may be a problem with the lubrication system.
Test Step 1. Check for "ACTIVE" Diagnostic Codes.
- Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
- Turn the keyswitch to the ON position. The engine should be OFF.
- Check for any Active Diagnostic Codes or Logged Diagnostic Codes.
Expected Result:
There should be no diagnostic codes that are present.
Results:
- OK - There are no diagnostic codes that are present. Proceed to test step 2.
- Not OK - There are diagnostic codes that are present.
Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual. Ensure that the repair eliminates the problem.
STOP
Test Step 2. Perform a Check of the Lubrication System.
- Perform a check of the lubrication system. Refer to the diagnostic procedure Troubleshooting, "Low Engine Oil Pressure" for possible causes.
Expected Result:
There are no problems with the lubrication system.
Results:
- OK - There may be an intermittent problem.
Repair: If the problem is intermittent, refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors".
STOP
- Not OK - There are problems with the lubrication system.
Repair: Repair the problem. Ensure that the repair eliminates the problem.
STOP